### Commercial **Airplanes** 

# 737 Service Bulletin **SPECIAL ATTENTION Number: 737-52-1154**  Original Issue: December 17, 2010 Revision 1: August 03, 2011 ATA System: 5231 **SUBJECT:** DOORS - Cargo Compartment Doors - Aft Cargo Door - Cross Beam D Inspection, Repair and Preventive Modification Export of this technology is controlled under the United States Export Administration Regulations (EAR) (15 CFR 730-774). An export license may be required before it is used for development, production or use by foreign persons from specific countries. The controller of this data has the individual responsibility to abide by all export laws.9E991 ECCN: 

## BOEING PROPRIETARY, CONFIDENTIAL, AND/OR TRADE SECRET Copyright © 2010 The Boeing Company Unpublished Work - All Rights Reserved Boeing claims copyright in each page of this document only to the extent that the page contains copyrightable subject matter. Boeing also claims copyright in this document as a compilation and/or collective work. This document includes proprietary information owned by The Boeing Company and/or one or more third parties. Treatment of the document and the information it contains is governed by contract with Boeing. For more information, contact The Boeing Company, P.O. Box 3707, Seattle, Washington 98124. Boeing, the Boeing signature, the Boeing symbol, 707, 717, 727, 737, 747, 757, 767, 777, 787, Dreamliner, BBJ, DC-8, DC-9, DC-10, KC-10, KDC-10, MD-10, MD-11, MD-80, MD-88, MD-90, P-8A, Poseidon and the Boeing livery are all trademarks owned by The Boeing Company; and no trademark license is granted in connection with this document unless provided in writing by Boeing.

BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: December 17, 2010 737-52-1154 Revision 1: August 03, 2011 1 of 4 2.0BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: December 17, 2010 737-52-1154 Revision 1: August 03, 2011 2 of 4 **BOEING SERVICE BULLETIN 737-52-1154**

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### Commercial **Airplanes** 

# 737 Service Bulletin **SPECIAL ATTENTION Short Form Revision**  **Number: 737-52-1154** Original Issue: December 17, 2010 Revision 1: August 03, 2011 ATA System: 5231 **SUBJECT:** DOORS - Cargo Compartment Doors - Aft Cargo Door - Cross Beam D Inspection, Repair and Preventive Modification Revision 1 is sent to change information. Only the changed information is described below. The Original Issue and Revision 1 are necessary to do the service bulletin. **COMPLIANCE INFORMATION RELATED TO THIS REVISION** No more work is necessary on the airplane(s) changed in accordance with the original issue of this service bulletin. **REASON FOR REVISION** This revision is sent to correct the inspection instructions in Paragraph 3.B.2.h.(1). In the original issue of this service bulletin, Paragraph 3.B.2.h.(1) incorrectly tells operators to do alternative inspections in accordance with FIGURE 11. In this revision, Paragraph 3.B.2.h.(1) is changed to tell operators to do alternative inspections in accordance with Part 11. **REVISION HISTORY** December 17, 2010 Original Issue: August 03, 2011 Revision 1:
**EFFECTIVITY** All 737-100/-200/-200C/-300/-400/-500 Airplanes. Refer to Paragraph 1.A.1. in the original issue of this service bulletin for the list of affected airplanes. **APPROVAL** This service bulletin was examined by the Federal Aviation Administration (FAA). The changes specified in this service bulletin comply with the applicable regulations and are FAA approved, as well as European Aviation Safety Agency (EASA)/Joint Aviation Authorities (JAA) approved for all EASA/JAA approved airplanes listed in the service bulletin effectivity. This service bulletin and its approval were based on the airplane in its original Boeing delivery configuration or as modified by other approved Boeing changes. If an airplane has a non-Boeing modification or repair that affects a component or system also affected by this service bulletin, the operator is responsible for obtaining appropriate regulatory agency approval before incorporating this service bulletin.

BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: December 17, 2010 737-52-1154 Revision 1: August 03, 2011 3 of 4For airplanes identified in this service bulletin, initial release, the repairs and/or modifications of this service bulletin have been reviewed as required by paragraphs (g) and (i) of Airworthiness Directive AD 2008-08-23, paragraphs (e) and (g) of Airworthiness Directive AD 98-11-04 R1, and paragraphs (g) and (i) of Airworthiness Directive AD 2008-09-13. The repairs and/or modifications are found to affect Structurally Significant Item F-1 of Supplemental Structural Inspection Document, D6-82669, but the F-1 inspections remain effective with the repairs and/or modifications installed. Therefore, an alternative inspection is not necessary for F-1. Do the existing F-1 inspections as required per paragraphs (g), (h) and (i) of Airworthiness Directive AD 2008-08-23, paragraphs (b) and (c) of Airworthiness Directive AD 98-11-04 R1, and paragraphs (g), (h) and (i) of Airworthiness Directive AD 2008-09-13. **EXISTING INFORMATION** In the original issue of this service bulletin, the existing information on page 53, Paragraph 3.B.2.h.(1) reads: Do an Ultrasonic inspection of the door frames in accordance with FIGURE 15. As an alternative, do the detailed inspections in accordance with FIGURE 11. **CHANGED INFORMATION** Paragraph 3.B.2.h.(1) is changed to read: Do an Ultrasonic inspection of the door frames in accordance with FIGURE 15. As an alternative, do the detailed inspections in accordance with Part 11.

BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: December 17, 2010 737-52-1154 Revision 1: August 03, 2011 4 of 4 **BOEING SERVICE BULLETIN 737-52-1154**